MariciUnder construction
Los Angeles County, California · EIA plant ID 69508 · Operator: Marici Project LLC
400 MW under construction (Batteries), first expected Jun 2027 · EIA-860M
Nameplate—MWSummer — MW
Generators0in service · 400 MW building
Net generation—GWh12 mo
Capacity factor—not meaningful for storage
Heat rate—thermal plants only
First online—
Capacity factor by year
Net MWh ÷ (summer MW × hours), primary-fuel units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
No capacity factor available.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Heat rate applies to fuel-burning (thermal) units only.
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| 1 | Batteries | BA | 400 | 400 | planned Jun 2027 | Under construction | — | coming soon |
Owner / operator
Operator: Marici Project LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
Nearby plants
Within 80 km.
| Walnut Creek Energy Park | 500 MW | 0.2 km |
| MM West Covina | 7 MW | 4.7 km |
| Puente Hills Energy Recovery | 50 MW | 7.4 km |
| Walnut Unified School District Walnut HS Hybrid | 2 MW | 9 km |
| Coyote Creek | 3 MW | 9.2 km |
| Industry MetroLink PV 1 | 2 MW | 9.3 km |